Arun Kumar

CS Graduate building backend systems and exploring AI. Sharing projects, ideas, and lessons along the way.

[Arun Kumar @arunkoo072]

How I Stopped Memorizing System Components and Started Seeing Trade-offs https://t.co/DzcHCLlqjh

[Arun Kumar @arunkoo072]

Everyone is obsessed with better AI models. The real bottleneck is systems design. A genius model inside a bad system is still a bad product.

[Arun Kumar @arunkoo072]

@ishabytes9 Ya it’s too good that even my eyes can’t see it WOW

[Arun Kumar @arunkoo072]

Most developers learn system design backwards. They learn components first. The real game? Knowing why you need them.

[Arun Kumar @arunkoo072]

@lyricsmotions 🫡🫡🫡

[Arun Kumar @arunkoo072]

@jiya_3063 Supabase

[Arun Kumar @arunkoo072]

The scariest part of a retry storm?

The original bug might already be gone.

But thousands of clients are still retrying every 5 seconds.

The system recovers.

Then gets killed by its own retries.

[Arun Kumar @arunkoo072]

@0xPrajwal_ Empty callback with Immediate execution

[Arun Kumar @arunkoo072]

What I took from stripe idempotency design and what I left
https://t.co/b45TQC6oQ2

[Arun Kumar @arunkoo072]

@lyricsmotions The question should be how many ex do you have?

[Arun Kumar @arunkoo072]

What’s the most underrated skill in software engineering?

[Arun Kumar @arunkoo072]

@ayesha_fatiima Inside Linus Torvalds brain 🫪

[Arun Kumar @arunkoo072]

@phoenix_ykp Gimme coffee.

[Arun Kumar @arunkoo072]

@devXritesh It’s not about solving puzzles. It’s about building the intuition to think in layers and solve complex problems.

That same thinking is what you need to design high-performance systems.

Even without DSA, engineers who can think this way will stand out.

[Arun Kumar @arunkoo072]

@vartika_debugs Vs code

[Arun Kumar @arunkoo072]

@ShaunakD07 Use vs code and store all files as markdown simple

[Arun Kumar @arunkoo072]

A database query can be “fast” and your API can still be slow.

Because the database isn’t always the bottleneck.

Sometimes it’s the 6 network calls you made before returning one response 💀

[Arun Kumar @arunkoo072]

@Palak3312 Spooky chacha ji

[Arun Kumar @arunkoo072]

@piyushgarg_dev Maine 4 Barr 1 Sal Mai jee main Diya sirf Covid ke chlte fhir jab itna padha to koi hire hi nahi kar Raha

[Arun Kumar @arunkoo072]

@PrashantSinghB_ Open source not a new slot but weekly 3 days projects 3 days open source